Chemistry: analytical and immunological testing – Inorganic acid or base
Patent
1997-08-13
2000-08-01
Soderquist, Arlen
Chemistry: analytical and immunological testing
Inorganic acid or base
436101, 436116, 436124, 436166, 436169, 436172, 422 8206, 422 8207, G01N 3300
Patent
active
060965576
ABSTRACT:
This invention provides a method for determining the concentration of a gas to be detected by a gas detector using a gas reactive pigment, wherein the dynamic range of the detectable concentration can be controlled. The method comprising bringing a gas to be detected such as a halogen gas, a hydrogen halide gas or the like into contact with a gas detector placed in a detection area and comprising a gas reactive pigment tetraphenylporphyrin or a derivative thereof represented by the general formula (1) or a metal complex of tetraphenylporphyrin or a derivative thereof represented by the general formula (2); and irradiating said gas detector with a detection beam and measuring a color change in said gas detector to determine the concentration of said gas to be detected, wherein the measurement is carried out in the temperature range from 40 to 80.degree. C. of said detection area; and a detection apparatus for carrying out the said method are disclosed.
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Igarashi Chiaki
Sadaoka Yoshihiko
Tanaka Kazunari
Ebara Corporation
Soderquist Arlen
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